I'm active in a few photography spaces online and I don't think I've talked to a single person who actively uses one of those. Most people use Lightroom or Capture One, which are also not available on Linux.
I'm curious as to what value you get from OEM RAW processors.
Exactly (or almost) the same render as from SOOC images.
I hate it when I deliver SOOC preview images that the customer really likes, but wants some small tweaks (remove a fly from the image, for example), and the colors or contrast on the resulting image is different because I didn't use the same processing engine or color profiles.
From what I remember, Nikon RAW files don't retain any changes you made to them in-camera unless you remove them from camera using the OEM app.
(Things may be different these days. My knowledge is from 2015.)
The idea that you can slap wine on the few things that you need is a weirdly repeated fiction, it wont make it true by repeating it, stop doing it.
Also, some of those software are mission-critical for me, and I can't really afford to use something that may break unexpectedly when I need to deliver images same day.
For example, I can't think of one RAW image processor from the original manufacturer that's available on Linux. Honestly, if there was, it would actually be a good reason to switch to that brand.
Also yes, I'm aware of RawTherapee and DarkTable. I use RawTherapee regularly, it's absolutely excellent and I highly recommend it, but it's also absolutely useless for certain use cases.
Nowadays I tend to use linux apps on Windows, thanks to WSL. For example, Windows' file browser crashes frequently on my setup, so I use Dolphin instead.